학술논문

Strangeness Enhancement in Cu+Cu and Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV
Document Type
Working Paper
Author
STAR CollaborationAgakishiev, H.Aggarwal, M. M.Ahammed, Z.Alakhverdyants, A. V.Alekseev, I.Alford, J.Anderson, B. D.Anson, C. D.Arkhipkin, D.Averichev, G. S.Balewski, J.Barnby, L. S.Beavis, D. R.Behera, N. K.Bellwied, R.Betancourt, M. J.Betts, R. R.Bhasin, A.Bhati, A. K.Bichsel, H.Bielcik, J.Bielcikova, J.Biritz, B.Bland, L. C.Borowski, W.Bouchet, J.Braidot, E.Brandin, A. V.Bridgeman, A.Brovko, S. G.Bruna, E.Bueltmann, S.Bunzarov, I.Burton, T. P.Cai, X. Z.Caines, H.Sánchez, M. Calderón de la BarcaCebra, D.Cendejas, R.Cervantes, M. C.Chajecki, Z.Chaloupka, P.Chattopadhyay, S.Chen, H. F.Chen, J. H.Chen, J. Y.Chen, L.Cheng, J.Cherney, M.Chikanian, A.Choi, K. E.Christie, W.Chung, P.Codrington, M. J. M.Corliss, R.Cramer, J. G.Crawford, H. J.Dash, S.Leyva, A. DavilaDe Silva, L. C.Debbe, R. R.Dedovich, T. G.Derevschikov, A. A.de Souza, R. DerradiDidenko, L.Djawotho, P.Dogra, S. M.Dong, X.Drachenberg, J. L.Draper, J. E.Dunlop, J. C.Efimov, L. G.Elnimr, M.Engelage, J.Eppley, G.Estienne, M.Eun, L.Evdokimov, O.Fatemi, R.Fedorisin, J.Fersch, R. G.Filip, P.Finch, E.Fine, V.Fisyak, Y.Gagliardi, C. A.Gangadharan, D. R.Geromitsos, A.Geurts, F.Ghosh, P.Gorbunov, Y. N.Gordon, A.Grebenyuk, O.Grosnick, D.Guertin, S. M.Gupta, A.Guryn, W.Haag, B.Hajkova, O.Hamed, A.Han, L-X.Harris, J. W.Hays-Wehle, J. P.Heinz, M.Heppelmann, S.Hirsch, A.Hjort, E.Hoffmann, G. W.Hofman, D. J.Huang, B.Huang, H. Z.Humanic, T. J.Huo, L.Igo, G.Jacobs, P.Jacobs, W. W.Jones, P. G.Jena, C.Jin, F.Joseph, J.Judd, E. G.Kabana, S.Kang, K.Kapitan, J.Kauder, K.Ke, H.Keane, D.Kechechyan, A.Kettler, D.Kikola, D. P.Kiryluk, J.Kisiel, A.Kizka, V.Knospe, A. G.Koetke, D. D.Kollegger, T.Konzer, J.Koralt, I.Koroleva, L.Korsch, W.Kotchenda, L.Kouchpil, V.Kravtsov, P.Krueger, K.Krus, M.Kumar, L.Kurnadi, P.Lamont, M. A. C.Landgraf, J. M.LaPointe, S.Lauret, J.Lebedev, A.Lednicky, R.Lee, J. H.Leight, W.LeVine, M. J.Li, C.Li, L.Li, N.Li, W.Li, X.Li, Y.Li, Z. M.Lisa, M. A.Liu, F.Liu, H.Liu, J.Ljubicic, T.Llope, W. J.Longacre, R. S.Love, W. A.Lu, Y.Lukashov, E. V.Luo, X.Ma, G. L.Ma, Y. G.Mahapatra, D. P.Majka, R.Mall, O. I.Mangotra, L. K.Manweiler, R.Margetis, S.Markert, C.Masui, H.Matis, H. S.Matulenko, Yu. A.McDonald, D.McShane, T. S.Meschanin, A.Milner, R.Minaev, N. G.Mioduszewski, S.Mischke, A.Mitrovski, M. K.Mohanty, B.Mondal, M. M.Morozov, B.Morozov, D. A.Munhoz, M. G.Naglis, M.Nandi, B. K.Nayak, T. K.Netrakanti, P. K.Nelson, J. M.Nogach, L. V.Nurushev, S. B.Odyniec, G.Ogawa, A.Oh, K.Ohlson, A.Okorokov, V.Oldag, E. W.Olson, D.Pachr, M.Page, B. S.Pal, S. K.Pandit, Y.Panebratsev, Y.Pawlak, T.Pei, H.Peitzmann, T.Perkins, C.Peryt, W.Phatak, S. C.Pile, P.Planinic, M.Ploskon, M. A.Pluta, J.Plyku, D.Poljak, N.Poskanzer, A. M.Potukuchi, B. V. K. S.Powell, C. B.Prindle, D.Pruneau, C.Pruthi, N. K.Pujahari, P. R.Putschke, J.Qiu, H.Raniwala, R.Raniwala, S.Ray, R. L.Redwine, R.Reed, R.Ritter, H. G.Roberts, J. B.Rogachevskiy, O. V.Romero, J. L.Rose, A.Ruan, L.Rusnak, J.Sahoo, N. R.Sakai, S.Sakrejda, I.Sakuma, T.Salur, S.Sandweiss, J.Sangaline, E.Sarkar, A.Schambach, J.Scharenberg, R. P.Schmah, A. M.Schuster, T. R.Seele, J.Seger, J.Selyuzhenkov, I.Seyboth, P.Shahaliev, E.Shao, M.Sharma, M.Shi, S. S.Shou, Q. Y.Sichtermann, E. P.Simon, F.Singaraju, R. N.Skoby, M. J.Smirnov, N.Spinka, H. M.Srivastava, B.Stanislaus, T. D. S.Staszak, D.Steadman, S. G.Stevens, J. R.Stock, R.Strikhanov, M.Stringfellow, B.Suaide, A. A. P.Suarez, M. C.Subba, N. L.Sumbera, M.Sun, X. M.Sun, Y.Sun, Z.Surrow, B.Svirida, D. N.Symons, T. J. M.de Toledo, A. SzantoTakahashi, J.Tang, A. H.Tang, Z.Tarini, L. H.Tarnowsky, T.Thein, D.Thomas, J. H.Tian, J.Timmins, A. R.Tlusty, D.Tokarev, M.Tram, V. N.Trentalange, S.Tribble, R. E.Tribedy, P.Tsai, O. D.Ullrich, T.Underwood, D. G.Van Buren, G.van Nieuwenhuizen, G.Vanfossen Jr., J. A.Varma, R.Vasconcelos, G. M. S.Vasiliev, A. N.Videbæk, F.Viyogi, Y. P.Vokal, S.Wada, M.Walker, M.Wang, F.Wang, G.Wang, H.Wang, J. S.Wang, Q.Wang, X. L.Wang, Y.Webb, G.Webb, J. C.Westfall, G. D.Whitten Jr., C.Wieman, H.Wissink, S. W.Witt, R.Witzke, W.Wu, Y. F.Xiao, Z.Xie, W.Xu, H.Xu, N.Xu, Q. H.Xu, W.Xu, Y.Xu, Z.Xue, L.Yang, Y.Yepes, P.Yip, K.Yoo, I-K.Zawisza, M.Zbroszczyk, H.Zhan, W.Zhang, J. B.Zhang, S.Zhang, W. M.Zhang, X. P.Zhang, Y.Zhang, Z. P.Zhao, J.Zhong, C.Zhou, W.Zhu, X.Zhu, Y. H.Zoulkarneev, R.Zoulkarneeva, Y.
Source
Subject
Nuclear Experiment
Language
Abstract
We report new STAR measurements of mid-rapidity yields for the $\Lambda$, $\bar{\Lambda}$, $K^{0}_{S}$, $\Xi^{-}$, $\bar{\Xi}^{+}$, $\Omega^{-}$, $\bar{\Omega}^{+}$ particles in Cu+Cu collisions at \sNN{200}, and mid-rapidity yields for the $\Lambda$, $\bar{\Lambda}$, $K^{0}_{S}$ particles in Au+Au at \sNN{200}. We show that at a given number of participating nucleons, the production of strange hadrons is higher in Cu+Cu collisions than in Au+Au collisions at the same center-of-mass energy. We find that aspects of the enhancement factors for all particles can be described by a parameterization based on the fraction of participants that undergo multiple collisions.